大变倍比制冷型长波红外变焦光学系统设计  

Design of cooled long-wave infrared optical system with large zooming range

作　　者：唐晗[1] 夏丽昆 刘炼 刘云 刘炫 刘愚[1] 张润琦 周春芬 杨开宇[1] TANG Han;XIA Li-kun;LIU Lian;LIU Yun;LIU Xuan;LIU Yu;ZHANG Run-qi;ZHOU Chun-fen;YANG Kai-yu(Kunming Institute of Physics,Kunming 650223,China;Army Equipment Department in Chongqing Military Agency Bureau,Chongqing 400000,China;Air Force Equipment Department in Chengdu Military Agency Bureau,Chengdu 610000,China;Naval Equipment Department of Guangzhou Military Agency Bureau,Guangzhou 510320,China)

机构地区：[1]昆明物理研究所,云南昆明650223 [2]陆军装备部驻重庆地区军事代表局,重庆400000 [3]空军装备部驻成都地区军事代表局,四川成都610000 [4]海军装备部驻广州地区军事代表局,广东广州510320

出　　处：《中国光学（中英文）》2024年第1期69-78,共10页Chinese Optics

基　　金：国家重点研发计划(No.0701200)。

摘　　要：长波红外变焦光学系统相对于中波红外变焦光学系统存在可用材料少、系统高低温环境无热化难度大等难题。本文采用机械补偿变焦技术实现光学多视场变焦,利用主动补偿的消热差技术使系统在−40°C~+65°C温度范围内能够清晰成像,实现四片透镜架构的制冷型长波红外四视场光学系统设计。该光学系统四视场焦距分别为25 mm、109 mm、275 mm、400 mm,变倍比为15,光学系统包络尺寸为268 mm(长)×200 mm(宽),光学零件总质量为618 g。该光学系统具有质量轻、性能高、成本低等SWaP-C特征,在辅助导航、搜索、跟踪等安防领域中具有较大应用潜力。Compared with the medium-wave Infrared(MWIR)zoom optical system,the long-wave infrared(LWIR)zoom optical system has fewer available materials and is difficult to athermalize in high and low temperature environments.In this paper,the multi-field zoom optical system is realized by using mechanical compensation zoom technology,and the active compensation athermalization technology is used to make the system image clear in the temperature range of−40°C—+65°C,to realize the design of the four-field LWIR optical system with four lenses.The focal lengths of the four fields of view are 25 mm,109 mm,275 mm and 400 mm,the zoom ratio is 15,the envelope size of the optical system is 280 mm(L)×200 mm(W),and the total weight of the optical components is 618 g.The optical system has SWaP-C characteristics such as light weight,high performance,and low cost,and will be widely used in security fields such as auxiliary naviga-tion,search,and tracking.

关 键 词：制冷型长波红外 变焦光学系统 机械补偿 无热化 

分 类 号：TN216[电子电信—物理电子学]